RFR: 8345589: Simplify Windows definition of strtok_r

[Kim Barrett]

Please review this change to move the Windows-specific definition of strtok_r
to globalDefinitions_visCPP.hpp.  In addition, the unused S_ISCHR macro is
removed and the S_ISFIFO macro is also moved.

Testing: mach5 tier1

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Commit messages:
 - move definitions

Changes: https://git.openjdk.org/jdk/pull/22597/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22597&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345589
  Stats: 23 lines in 2 files changed: 14 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22597.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22597/head:pull/22597

PR: https://git.openjdk.org/jdk/pull/22597